Sarin was discovered by Dr Schroeder. 1939, Dr. Schrade began to study fluorine-containing compounds with a carbon-phosphorus bond (C-P) in the most advanced laboratory provided by the German military at that time. As a result, he found isopropyl methylphosphonate, which is more toxic than tabun (a pesticide synthesized by the doctor and used by the Germans as a chemical weapon). Dr. Schrade named it "Sarin", which is the initial capital combination of the names of four key people involved in the development of this poison. The doctor thought that this compound had great potential as a military poison, so he immediately sent it to the Chemical War Bureau of the Ordnance Department for identification, and soon began the development work. However, great difficulties were encountered in organizing the production of this poison. The reason is that fluorination with hydrofluoric acid is always inevitable in the last step of synthesizing poisons, and the corrosion problem must be solved when fluorination is carried out. Therefore, corrosion-resistant materials such as timely and silver are used in poison factories in Stopan and Munster. Finally, a satisfactory process was worked out, and a large-scale production plant was established in Falkenhagen in September 1943. However, when the Soviet army launched a large-scale attack on Germany, the factory had not yet been completed and put into production. So by the end of World War II, only a small amount of sarin was actually produced.